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Molecular imprinting photonic crystal detecting card and application

A photonic crystal and molecular imprinting technology, which is applied in the fields of material science and chemical analysis and detection, can solve the problems of lack of specificity, achieve the effects of avoiding interference, overcoming tedious pre-processing and time-consuming analysis, and improving the detection rate

Inactive Publication Date: 2018-02-06
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Photonic crystals have fast response and self-reporting of apparent color, but lack of specificity when applied to the analysis of external stimuli; molecularly imprinted polymers have good selectivity for targets

Method used

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  • Molecular imprinting photonic crystal detecting card and application
  • Molecular imprinting photonic crystal detecting card and application
  • Molecular imprinting photonic crystal detecting card and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Monodisperse SiO 2 Preparation of microspheres

[0032] Add 180mL of absolute ethanol, 9g of deionized water and 10mL of ammonia water into a 250mL flat-bottomed flask, put it into a constant temperature oil bath, wait for the temperature to rise to 35°C, continue stirring for 30min, then quickly add 8g of ethyl orthosilicate to the reaction The system was sealed and stirred at constant temperature for 12 hours. The white emulsion obtained by the reaction was centrifuged at 4000r for 20min, redispersed in absolute ethanol 4 times, and dried in vacuum at 55°C for 24h to obtain a white powder SiO 2 Microspheres. In the experiment, SiO with a particle size of about 250nm can be obtained by changing the material ratio and stirring speed. 2 Microspheres.

[0033] (2) SiO 2 Preparation of Photonic Crystals

[0034] Soak the slides in Piranha solution (concentrated sulfuric acid-hydrogen peroxide 7:3, V / V) for 24 hours to remove organic matter on the surface of the s...

Embodiment 2

[0050] (1) Monodisperse SiO 2 Preparation of microspheres

[0051] Add 180mL of absolute ethanol, 9g of deionized water and 10mL of ammonia water into a 250mL flat-bottomed flask, put it into a constant temperature oil bath, wait for the temperature to rise to 40°C, and continue stirring for 60min, then quickly add 10g of ethyl orthosilicate to the reaction The system was sealed and stirred at constant temperature for 12 hours. The white emulsion obtained by the reaction was centrifuged at 4000r for 20min, redispersed in absolute ethanol 4 times, and dried in vacuum at 55°C for 24h to obtain a white powder SiO 2 Microspheres. In the experiment, SiO with a particle size of about 350nm can be obtained by changing the material ratio and stirring speed. 2 Microspheres.

[0052] (2) SiO 2 Preparation of Photonic Crystals

[0053] Soak the slides in Piranha solution (concentrated sulfuric acid-hydrogen peroxide 7:3, V / V) for 24 hours to remove organic matter on the surface of ...

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Abstract

The invention relates to a molecular imprinting photonic crystal detecting card and application thereof. Molecular imprinting pre-polymerization liquid is poured into a photonic crystal template; after polymerization, template molecules are washed away to obtain the molecular imprinting photonic crystal detecting card. The molecular imprinting photonic crystal pesticide residue fast detecting cardrelated by the invention has specific selectivity on target pesticide molecules; the interference of other pesticide molecules in complicated test environments can be avoided; the surface structure color can respond the outside stimulation; the naked eye visibility is realized; through contrast with a standard color card, the content of methomyl in an object to be tested can be fast obtained. Theprepared molecular imprinting photonic crystal detecting card provides an accurate, sensitive and fast novel method for detecting the methomyl pesticide residue; the reference is also provided for the development of other kinds of pesticide residue detecting technologies.

Description

technical field [0001] The invention belongs to the field of material science and chemical analysis and detection, and specifically relates to a molecularly imprinted photonic crystal detection card and its application, in particular to a technology of molecularly imprinted polymer combined with a visible photonic crystal, which provides a solution for the detection of pesticide residues. new method. Background technique [0002] Methomyl (methomyl), also known as methomyl, chrysanthemum, lanleiwei, etc., chemically named 1-(methylthio)ethyleneamine-N-methylcarbamate, is a widely used Spectrum, systemic carbamate pesticides. At present, the detection of methomyl at home and abroad is limited to liquid chromatography, but there are shortcomings such as cumbersome pretreatment and low detection sensitivity. [0003] Molecular imprinting technology is a technology for preparing materials with specific recognition ability for specific target molecules. It has shown broad appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 王颜红张红周强
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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